公开(公告)号：US11063517B2

公开(公告)日：2021-07-13

申请号：US16750999

申请日：2020-01-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yujian Lin ,  Haitao Chen ,  Yue Chen ,  Zhiqiang Xiang

IPC: H02M1/00 ,  H02M3/158 ,  G06F1/28 ,  H02M3/335

Abstract: A power supply circuit is disclosed. The circuit includes n capacitors, m power branches, and a control chip, where the m power branches include at least one first-type power branch and at least one second-type power branch, the first-type power branch includes a pre-boost topology structure and an open-loop topology structure connected in series to the pre-boost topology structure, the pre-boost topology structure is connected to the control chip, the pre-boost topology structure includes a straight-through state and a closed-loop state, and the control chip is configured to control, based on an output voltage of the power source, the pre-boost topology structure to switch between the straight-through state and the closed-loop state, so that the pre-boost topology structure pre-adjusts the output voltage of the power source and outputs a voltage range that meets a requirement of the open-loop topology structure.